[solved] QDeclarativeItem geometry

imihajlov

I'm trying to wrap a QWidget-based class for use in QML. I use class derived from QDeclarativeItem and override method geometryChanged in it:
@
class PlotWidget : public QDeclarativeItem
{
Q_OBJECT
public:
PlotWidget(QDeclarativeItem *parent = 0);
protected:
void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
private:
class Impl;
std::auto_ptr<Impl> impl;
};
@

Inside the class PlotWidget I have a QwtPlot object (QwtPlot is a QWidget-based class, I've tried QPushButton also) and QGraphicsProxyWidget:
@
class PlotWidget::Impl
{
PlotWidget *that;
public:
QwtPlot *plot;
//QPushButton *button;
QGraphicsProxyWidget *proxy;

Impl(PlotWidget *that):
    that(that),
    plot(new QwtPlot(0)),
    //button(new QPushButton(0)),
    proxy(new QGraphicsProxyWidget(that))
{
    proxy->setWidget(plot);
    //proxy->setWidget(button);
}

~Impl()
{
    delete proxy;
    //delete button;
    delete plot;
}

};

PlotWidget::PlotWidget(QDeclarativeItem *parent) :
QDeclarativeItem(parent),
impl(new Impl(this))
{
}

void PlotWidget::geometryChanged(const QRectF &newGeometry, const QRectF &)
{
qDebug() << newGeometry;
impl->proxy->setGeometry(newGeometry);
}
@

My QML code is the folliwing:
@
Rectangle {
width: 640
height: 480
PlotWidget {
id: plot
//anchors.centerIn: parent
x:10
y:10
width: 400
height: 400
}
}
@

The problem is the position of the widget. I set it to (10, 10), and it comes to geometryChanged as (10, 10) too, but the widget is located at (20, 20) in the window (I've checked it with a screen ruler). The size of widget is ok - it is 400x400.
Who multiplies position coordinates by 2? How can I make it set real coordinates?

dmcr

Hello,
you didn't put the code for drawing the widget thougth ?

imihajlov

[quote author="dmcr" date="1338447214"]you didn't put the code for drawing the widget thougth ?[/quote]
Which drawing code do you mean? The plot widget is drawn correctly, but positioned incorrectly.

dmcr

Well i've read that too fastly......
In fact you don't need to setGeometry for your PlotWidget.
@impl->proxy->setGeometry(newGeometry);@
It has to have (0,0) coordinates in the DeclarativeItem which is embedding it.

imihajlov

[quote author="dmcr" date="1338463579"]Well i've read that too fastly......
In fact you don't need to setGeometry for your PlotWidget.
@impl->proxy->setGeometry(newGeometry);@

It has to have (0,0) coordinates in the DeclarativeItem which is embedding it.[/quote]
Oh thank you! Now widget positioning works fine!

dmcr

Nope :)
then you can put [solved] in in the title of the post :)